Stepping tool



"5.1. AND R. E. CUTTER.

STEPPING TOOL.

APPLICATION FILED DEC-20, 1919.

1,406,156. Ianted Feb. 7, 1922.

` JNVENTURS. WITNESS.- EdwardJCU/fer Roy EE0/"727' V4o Y of our improved stepping tool.

7 UNITED *STArggm-EN-r 10mm nrw-ABD Jl. oo'r-'rfnR'nNnnoY n. COMER,QFBHILADELBIA, PENNSYLVANIA.

Y v sirianimaY roer.,

Be it known that we, EDWARD JfCo'r'rnR fand ROY' Co'rlrnn, `citizens ofthenited tingV through the material.

vide 'an improved formof tool for -stepping a tirecasing when repairing blow-outs, punctures and the like.V v

Y Another objectof vthe inventionv topro vide a tool of the nature referred to which` is httedwith an adjustable' bladeso that the' depth' of the incision can be accurately gauged. Y

A still furtheriobject is to furnish a stepping"k tool by theV use of which. the accidental cutting of the materialbeyond' the desired ply or fold is ren'deredinipossible. Y

WithV the foregoing and other objects in view, our invention consists-essentially inA the novel features of construction, Ycombination and arrangement of parts hereinafter fully described and Vmore particularly point,- Ved out by the appended claims.

AIn the further disclosure of the invention reference is to be had to the accompanying sheet of explanatory drawings constituting.

a part of this specification,l and in which like characters of reference designate the Y same or similar parts in all the views.

Y i approximately on the line in Figure 1 Y l screws 14 and separating-the parts 11,; 12,

whereupon said blade 22, and its associatedV v designate t rigidly secured together by screws 14. l Y

opposed members 1l, 12, are preferably' Figure 1- isa longitudinal side elevation*V JFroni the foregoing it will bejreadily seen Figure 2 is a similar view with one part of the casing removed tomore clearlyl depict the underlying structure.

Figure 3- is a longitudinal section taken and, Y, Y

Figure etis a transverse section taken on the line le-4f `in Figurerl, and looking towards the left hand thereof.

Referring Y to the drawings the numeral 10,

which areconveniently doweled at l13 and The main object of this' invention is to prolof the inclined part 1G.

e tool inits entirety `and it comprises opposed longitudinal niem.bers.11,12,f

shaped as shown, thatfis tosay they arechamfered downv at 15,l and 'finished'off with aninclihedjpart"or narrow working end A16, and an ohliquelydisposed returnedge or fend? 17, Vso that when thev tooll 10l isl moved overthe surface o fthe material from which ibisdesiredl to'rcmoveone or more plies or lfolds-the cuttingftheieof canonly beeffected when`l saidy toolis drawn along withlthe inclined," part' 16,1 in direct VContact therewith.

lare reduce'dand turned 18, so that lfirm' holdV can be maintained on the tool whenin f use and they are enlargedor headed. at 18.

Longitudinally of the part V11,1 form a recv tangular groove 20, as well as acut away part'21, in the .former of which Vsnugly, tsl

ablade 22, suitably ground at 28, to constitute'the .cutting point and itis Ato be noted that said point'23,is guided outwardly in line .with Vtheangular. or `forward point 24,

bladej22, is vprovided. with an Vextensionor shank 25-a`nd a heel portion 26. at

rightanglesthereto, said heel portion being specimenofmetfersrtent.\ Patented Fear, 19227. Y iippncatiornied December ap, i919; seriainaeiazes: 'l I Furthermore the opposedj[membersY 111, y"12, 'i

threaded for the passage of a screw 27 which ik seats in the cutout portion21, and a collar-v or shoulder V28 thereon abuts the part 29 'Y of the member 11. Y This screw 27,`is extended beyond the shoulder 28 Vat 30""to lie Vin a. groove y31,.Y and Vit is threaded to-rec-eivea lock nut32, whilsta gnarled head V33 issecured to the outerV end thereof whereby said screw27 can be manipulated to project the cutting end 23 of the blade 22 forwardly the requisite amount to vcut one or more plies 'or folds of the; material to be repaired or 'operated upon:v Obviously a reverseturningy ofthe head 33 will 'effect the retraction of thev cutting Vpoint 23 into the tool 10.Y

that byour inventionwe provide anexceed# inglyeiieient and effective tool for the purposes'ispecified whilst at thesame time the or grinding. by simplyv first removingV the screw27 can be lifted out ofthe part'12.

` Still further it is to'be yparticularly noted th'atfthe housing of thejblade 22 inV the groove 20 asA set forthensures its `remaining 1 rigid atlall times, whereas by providing a finely threaded screwv 27 Vvery vthin cuts Vcan be rendered possible. f Finally `by shaping the end of the tool as described at 16, 17 anyV ilo liability or tendencj)Y to cuttingon the return'end offset and extended to provide aV Shaniav y stroke'is entirely obviated, and Whilst We have described a preferred construction Aof our invention it is to be clearly understood We do not limit Ourselves to the precise details as. regards shape and arrangement Y :shown and' particularlyy described; v other `folds from a sheet o forms and combinations being possible with- I Vv*out departing from the spirlt and scopeY of i0, U Y f -Havingdescribed our invention what we clann las new and desire to Secure'by :Let-y Athe appended claim .f

tersy Patent is Y In atool for cuttin .one or more plies or material, comprising a hollowvihandle having an obtuse end and a Vrestricted passage entering from the said fend of, .the vbore properoif the handle7 a blade 'slidable through ythe restricted passage andghav'ingxits .cuttln edge arranged" at an obtuserangle, said b ader having its inner I that is received in the" bore proper of the handle and V,the end of the said 'shanlbeing arranged atan angley and provided Witha lthreaded opening,v a bolt member passing through the vend :of the handle opposite that provided with the restricted passage and receivedthrough the threaded openingfin the angle end of the'shank, a knurled operating V'element for the bolt arranged on the-outer endjthereof, means for yholdingv the bolt against longitudinal movement in the bore on the handle to prevent the turning thereof when the same has been actuated to project 0r retract'. the handle. A* InY testimony tures.

nor E.' ;coTTER..

knifej With respect to the ^Whereof we .affix our e yEnvvnian corran.; 1

of the handle, and means-for locking the bolt v 'd 

